Casting apparatus.



I. sHNBERG.

CASTING APPARATUS.

APPLICATION FILED NOV. 14, 1908.

Patented on.19,19o9.

NMX.

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I. s-HNBERG. CASTING APPARATUS. APPLIUATION FILED NOV.14, 1908.

Patented 0011. 19, 1909.

4 sums-SHEET z.

I. SHNBERG.

CASTING` APPARATUS.

AIPLIOATION FILED Nov. 14, 190s.

937,477. Patented 0ct.19, 19o9.

1 SHNBERG. l GASTING APPARATU APPLICATION FILED NOV. 14, 190B.

Patented 001;.19,1909.

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IsAAc SNBERG, or NEW Yon'k, JN. Y.

cAsTING APPARATUS.

Specification of Letters atent.

Patented 0ct. 19, 1909.

applicati@ mea novemner 14, laos. fse'rial No. 462,594.

To all 'whom 'it may concern:

Be it known vthat I, ISAAC SHNBERG, of the borough of Brooklyn, city and State of N ewYork, have invented a certain new and useful Improvement in Casting Apparatus, of which the following is a specification.

This invention pertains to mechanism for effecting a 'sequential operation involving the closing of the separable mold'and'. its approach to the casting spout, the lockingof the mold parts or sections together and to the lspout, the injection of molten metal into the mold, the separation of the sprue from the casting in the mold cavity and the withdrawal of the filled mold, a'nd finally' the separation of the moldsections-this cycle of operations being repeated continuously during the running of the apparatus.

Various features of novelty and utility are embraced 'in thev foregoing apparatus as dis-4 closed in the drawings forming part of this .specification and in which- Figure 1 is a plan View of a casting apparatus in which are embodied my present improvements. Fig. 2 is a side elevation. Fig. 3 is alongitudinal section through the pressure cylinder or chamber located in the melting pot. Fig. 3a is an enlarged detail of means for locking the mold part 'to the cast- 1g spout during the casting operation. Fig. 4 is a cross section of Such cylinder. Figs. 5 and 6 are views similar to Fig. 2, these two figures showing the operative parts in two positions corresponding. to a partially open Y and a fully open conditionof the mold. Fig. 7 is partly an elevation, partly a section of the supplemental cam shaft with associated parts. Fig. 8 `is a perspective 'view of the shiftable mold-carrying table or slide of the apparatus, the angle plate for supporting the mold sections being broken away. Fig. 9 is a detail of means for locking together parts of the closed separable mold, this con'- dition of the mold prevailing immediately rior to and during the Acasting operation.

ig. 10 is a cross section through amold of a somewhat different construction .to that already shown taken .on the liney of the inlet passage and shows the valve for controlling the exhaustion of the mold cavity and the separation of the sprue from the casting. Fig. 11 is a cross section of the apparatus.

Fig. 12 is an enlarged detail of certaln cams on the supplemental cam shaft together with van angle vplate .9 extending above and -at an associated parts. Fig. 13 is a view of `a modified construction for separating the is journaled-in suitable bearings on the side` frames. and here carries fast and loose pulleys 3', 32, meshes with a gear 4 secured to a main cam shaft 4 also journaled in bearings on the side frames. p

It may be premised that the mold is 'mounted on a carrier slide 5 adapted to move aldn ways 5A at the top of the frame work the ide being held to its prescribed line "of travel by gibs 52. A reciprocating motion is imparted to the carrier from a 'cam 6 on shaft 4', a cam ro 6 on cam-lever 7 traveling in a groove 62 being connected by a link 8 with the carrier.

`Referring now to thev mold andl mold mechanism,lit should 4be stated that the particular separable mold embraced in the construction illustrated in all figures except Fig. 10 embodies three parts or sections, one of which is'fixed relatively to the carrier while the other two sections are movable relatively to each other and to the first men'- tioned part.

At one end of the carrier there is provided .angle to e upper face of the carrier. Secured to the inclined face of this angle piece is the so-called stationary mold section 10 while in juxtaposition to such section along and a driving pinion 33 which of the cam andthe lever 'y the angle piece is a second section 10.l which is secured to a slide `102 mounted on ways 1()s with which the angle piece is provided. The third mold section designated by l 11 is secured to a transverse extension 11 of a slide 112' mounted on Ways 113 on a swinging support 12, the bearings for the supporting shaft 12 of which are designated by 122, see Fig. 8.

The separation of the mold sections involves in the present instance an initial movement of section 11 at substantially a right angle to the meeting plane of the section with sections -10 and 10 after which section 11 is swung to a position' indicated in Fig. 6. During this swinging movement, section 10 is moved upward along ways 103.

In order to obtain these opening (and re verse or closing) movements the motion of the main slide or carrier 5 is in the present instance utilized to actuate controlling links fulcrumed to stationary parts on the'frame work and to the respective moving parts. That is to say, support l2 is connected 'by a *link 13 with the frame work while an arm 14 fast to shaft 12 is connected by link 14 to the frame work, a pair of side arms 142, 142 rigid with the shaft being connected by links 142 to carrier 112. This latter connection in order to permit of the insertion of molds of various sizes is an adjustable one, here comprising on each side a nut 144 to which the link 143 on that side is connected,`

each nut being threaded on a corresponding adjusting screw 142' rotatively mounted on the slide. Links 13 and 14 are of such length and so related that during the first portion of1 the backward movement of carrier 5 an initial movement of mold, Section l1 results, as aforesaid, to properly draw fromlthe casting and to free the usual dowel pins 15. This may be more readily attained by making the fixed fulcrum supportl of link 14 adjustable as by mounting such support lon a slotted aim 16 adapted to be secured to the frame work in various positions. Similarly slide 102' ismoved to and fro by a link 17 fulcrumed at one end to the framework and at the opposite end to an arm 17 of a shaft 17 journaled on the plate 9, arms 172, 172 of this shaft being connected by links 173, 173 to nuts 172, 174 on adjusting screws 175, 175 for a reason already explained. Means are also shown for locking the mold sections together when the mold is in its casting posltion, see Fig. 2, the lockin mechanism here comprising a pair of si e arms 18, 18 loosely mounted upon the eccentric ends of a shaft 182, mounted in bearings in the angle plate 9. Each side arm 18 is provided with a threaded extension 18 whereby a cross bar or bail 182 may be adjustably secured to the extensions in such a position as to cause the cross bar to swing to place back of mold section. 11 and away therefrom during the reciprocation of carrier 5, this actuation of the cross bar being under the control of links 19, 19 one at each side. A rib 19 on the upright part 11 of slide 112 forms a seat for the cross bar the latter being drawn firmly against its seat by a partial turning of shaft 18a just prior to the injection of molten metal. This locking motion of the shaft is here effected by a cam 20 on supplemental cam shaft 21, a slotted link 22 having a cam roll 22 and being connected to a forked lever- 23, preferably adjustably mounted as for instance by pivoting the same to an arm 23 'adjustably secured to a fixed shaft 24. Forked lever 23 is held in such a position that when the mold carrier moves backward to its casting position, a pin 232 on arm 23a extending from shaft 18"L enters the for-k of the arm whereupon cam 2O rocks arm 23 and turns shaft 18a just prior to the casting operation. The eccentric ends of the shaft cause the slight drawing inward on cross bar 182 thus clamping section 11 tightly to the other sections. Supplemental cam shaft 21 may be driven by a bevel gear connection 25 from shaft 4.

While I have shown and described a threepart mold, obviously a two-part one may be used, parts 10 and 10 being combined into onesection as in Fig. 10, fast to angle plato 9, in which event slide 102 and its operating parts are omitted.

It will be understood that when the mold carrier is in its extreme position to the right, see Fig. 2, it is in its casting position, ready for the injection of metal. In this position of the parts an inclined extension 26 which contains the passageway 26 leading to the mold is in juxtaposition to casting spout 27 the extension being preferably firmly held against the end'face of the spout during the casting operation by some means, such, for instance as that shown in which locking levers 28 (one only being shown) loose on fixed shaft 24 are shifted to a position by cams 29, 29 (on supplemental cam shaft 21) which contact with respective rollers 29', 29' on the levers, such that an inclined extension 292 on each lever impinges against a corresponding roller or pin 293 on extension 26, the outward thrust being taken by a shoulder 294 on the spout. The parts are thus held securely together until the continued rotation of cams 29, 29 frees the levers leaving the mold, etc., free to be withdrawn.

Casting spout 27 has the usual upwardly inclined passageway 30 therethrough, it being here'formed integral with one head 31 of a pressure chamber 32 having an opposed head 33 and tie bars 33 clamping the two heads rigidly to the shell 332. Pressure chamber 32 is suspended within a suitable melting pot 34 it being here clamped to the aforesaid fixed shaft or frame tie bar 24 by a cap 35. Some convenient and desired source of heat 36 will be used. Pressure chamber 32 is provided with a -valve 37 for `permitting the inflow of metal from the melting pot and for shutting off the metal in the pressure chamber therefrom, the stem 37 of this valve being here connected to an arm 38 extending from a rock shaft 39 journaled in uprights 39 secured to a crossbar 392 attached to a fixed portion of the apparatus, this cross bar being here shown as passing under the ressure chamber and steadied or centered t ereon by screws 39.

.1n the pressure. chamber masemer n Y a Ai. rockarmf. @extend-in .from-.shaft Sacarries at its end a roll 40 withi acam .402; carried.l on shaft 21 by 4which valve operatedin proper timingv Inforder tofsubjeet the metalin the pressurezchamber to a pressuresuitable for its, forcible injection into the mold, I may use .compressed air. A pressure-tank 41 thereof is indicated, a pipe 41 leading from the tank to the pressure chamber 32 and being extension-.434 of the pressure chamber shell 332,.l When not, so used iston 43 may be fixed in position by a loc 'ng piny 43.

Revertlng to the mold it should be stated that the passage through extension 26 opens outthrough angle piece 9 .in the parting plane of mold sections 10 and 10', such passageway being continued through these sections or the single section: of Fig. 10l by opening 44 into the .mold cavity 45.

A further feature of thepresent apparatus involves exhaustion ofl air from the mold cavity prior to the metal injection thereinto.

For this' purpose I may use a vacuum cylinder' 46 mounted on the framework and havin therein a piston whose rod 46 is ailixe o a standard 46-2 secured 'to carrier 5. A flexible pipe 47 leads from cylinder-46 to and connects with a passageway 47 in mold section 11 communicating therethrough with the mold cavity. A shut-olf valve is shown as mountedin mold section 11, this valve comprising a part 48 provided with a port 48 and a returning spring 482. When carrier 5 moves forward a vacuum is formed 1n the vacuum space between the ypiston and valve part 48, until the mold reaches its casting position whereupon a valve 49 is actuated through valve stem arm '49',- rod 492 and cam-49s on cam shaft 4 and pressure from tank 41 admitted through conduit 50 to the top lof valve part 48. Port 48 is thus alined with passageway 47', air exhausts from the mold cavity and the-passageway is subsequently closed by theI continued movement of the valve part. When the mold returns to its open position cam .493 reactuates valve 49 to shut oil' the pressurel from the tank, the parts being made sufficiently loose to permit the air thus inclosed between valves 48 and 49 to leak out and allow spring 482 to return valve 48 to its original position.

adapted to engage Figs. 10j andt 13 Z illustrate. that feature of the present.' invention in accordance with whichi the operation4 of the apparatus involves a step in which the sprue is separated. A` sprue cutter'in thenature of a. valve.51, see Figs. 10 and 13, is located to cross the 'passage way? leading from the casting spout to the moldcavity, it being here mounted in that part of the moldin contact with angle plate 9 and moving ina line transverseto the axisof such passage way. According to the device of 10, valve 51 is forced to position across the path of metal flow bya spring 52. During the casting operation and when the metal is forcibly injected, the pressure to which the molten metal is subjected is elfective in moving the valve back against the pressurey of its returning sprin l'VIl'g the When, however, the pressure on the metal is released, the pressure, of the spring exerts itself to, force the v alve to a position in which the metal in the mold Cavity is diflow of vmetal unobstructe .Y

vided from the metal in the pressure chamber it` being contemplated that the parts shall be maintained 110tenough to render the metal on the chamber side of valve 51 sufficiently fluid to iow back toward thev pressure chamber.. Instead of relying on the pressure of the molten metal to open the valve it may be operated mechanically as in Fig. 13 inv which a lever 53 mounted on the mold carrieris connected to stem 54 of Valve 51 and is so related to a push rod 55 operated by a cam 56 that the valve may be moved outward at the pressure of a returmng spring 56.

The operation of the foregomg apparatus nay be described in. general terms as follows: Assuming the mold to be in its casting position, as. in Fig. 2, the rotation of driving shaft. 3- -opens valve. 49 admitting ressure fluid toa the top of valve part 48. li'Iold cavity is thus exhausted, and. valve'412 being thereafter operated, molten metal is forcibly injected into the mold cavity. Pressure on the metal being released valve 51 is actuated cutting oil:` the sprue which opera-4 tion is followed by the backward movement of mold carrier-5. Prior to this backward movement the descent of arms 28 unlocks extension 26 from the casting spout while lthe actuation of forked arm 23 turns shaft 18a releasing the mold from the grip of cross bar 182. During the backward movement of the mold carrier, links 19 raise cross proper time 'against the bar 182, and'the initial operation of links 13 and 14 brings mold section 11 to the tposi tion indicated in Fig. 5. The continue eration of these links and link 17 results 1n substantially the position of the apparatus' indicated in Fin'. 6 when the castmg may be removed. Mild' carrier now moves forward, air is exhausted from cylinder 46,

valve 37 is opened to admit a. further sup ly from the me ting pot into pressure chamber 32 and the closed and locked mold ultimately assumes its casting position to be followed by a repetition as aforesaid.

Having described my invention, I claim: 1. The combination of a shiftable mold carrier, a supporting frame work, a sectional mold on the carrier, a fixed casting spout, mechanism for causing the mold carrier to approach and to recede from the casting spout, a melting pot, a pressure chamber and means connecting mold sections on the carrier with the framework whereby the vmovement of the mold carrier causes the relative movement of the mold sections.

2. The combination in a casting apparatus, ot' a supporting frame work a shiftable mold carrier a swinging support on the carrier for a mold section and' a. link connecting said swinging support with said 4supporting frame work for Swingin said support to and fro during the to an fro movement of the carrier.

The combination,in a casting apparatus of a shiftable mold carrier, a svvlnging support on the carrier, a mold section slidably mounted on said support, and means for causing a substantially parallel motion of said mold section during the initial opening movement thereof. l

4. In a casting apparatus, the combination of a shiftable mold carrier, a supporting frame work, and mold section supportingslides on said carrier linked to said frame Work for'the purpose specified.

5. In a casting apparatus, the combination of a supporting frame work, a mold carrier, a vacuum cylinder and piston supported one on said carrier and one on said trame work, a pressure cylinder, a melting pot, a source of pressure Huid, and valve mechanism for controlling the exhaustion of the mold cavity and the entrance of pressure Huid to said pressure chamber.

6. In a casting a paratus, the combination of a shiftable mol carrier, a sectional mold thereon, a frame Work to which sections of Ithe mold are linked whereby the movement of the mold carrier causes the relative movement of the mold sections, a casting spout, and means for locking the mold sections together and the mold to the casting spout during the casting operation.

7. In' a casting a paratus, the combination of a shiftable mol carrier, a sectional mold adapted to be opened and closed during the movements of the carrier, a mold section locking bar on said carrier adapted to swing to its locking position upon the closing of the mold, a shaft upon which said bar is eccentrically mounted, and a cam for turning said shaft when the bar is in its lockingr position.

8. In a casting apparatus, the combination of a shiftable mold carrier, a supporting frame Work and mold section supporting slides on said carrier adjustably linked to said frame Work for the purpose specified:

9. In a casting apparatus, the combination of a separable mold a casting spout, a pressure chamber, a melting pot, a sprue cutter adapted to move across the passage way leading from the casting spout to the mold in a line transverse to the axis of such passage way and be actuated in one direction by pressure in the ressure chamber, and means for forcing sald sprue cutter in the opposite direction.

In witness whereof I have signed this specification in the presence -of two subscrlbing witnesses.

ISAAC SHONBERG. Witnesses:

BRNARD S. DEUTSCH', CELIA R. DEUTSCH. 

